Blowout preventer

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 33/06 (2006.01)

Patent

CA 2760383

A blowout preventer comprising a body (32) having a through-bore (37), a ram actuator (48,50,52) and a ram block (46) for selectively allowing fluid flow through the through-bore (37), the ram block (46) comprising an opening (52) and a knife (54) about at least a portion of the opening (52), the knife (54) for shearing an item in the opening (52). Also disclosed is a blowout preventer having a ram block (46) having an opening therein and an annular seal (66) arranged about the through bore (37), such that, in use the annular seal (66) inhibits flow of fluid between the ram block (46) and the body (32).Also disclosed is a blowout preventer having a cavity (55) for receiving a portion of sheared tubular (38). Also disclosed is a blowout preventer comprising a body (32) having a through-bore (37), a single ram actuator (39) and a single ram block (46) for selectively allowing fluid flow through said through-bore (37), said ram block comprising a first portion with an opening (52) therein and a second blind portion (82a), such that fluid can flow through said through-bore (37) and said opening (52) when said blowout preventer is in an open condition and fluid is inhibited from flowing through said through-bore (37) by said blinded portion (82a) when said blowout preventer is in a closed condition.

L'invention porte sur un obturateur anti-éruption qui comprend un corps (32) ayant un trou traversant (37), un actionneur à piston (48, 50, 52) et un bloc de piston (46) pour permette sélectivement un écoulement de fluide à travers le trou traversant (37). Le bloc de piston (46) comprend une ouverture (52) et un couteau (54) autour d'au moins une partie de l'ouverture (52), le couteau (54) servant à cisailler un article dans l'ouverture (52). L'invention porte également sur un obturateur anti-éruption ayant un bloc de piston (46) ayant une ouverture dans celui-ci et un joint annulaire (66) agencé autour du trou traversant (37), de telle sorte que, lors de l'utilisation, le joint annulaire (36) empêche un écoulement de fluide entre le bloc de piston (46) et le corps (32). L'invention porte également sur un obturateur anti-éruption ayant une cavité (55) pour recevoir une partie de tubulure cisaillée (38). L'invention porte également sur un obturateur anti-éruption qui comprend un corps (32) ayant un trou traversant (37), un actionneur de piston unique (32) et un unique bloc de piston (46) pour permettre sélectivement un écoulement de fluide à travers ledit trou traversant (37), ledit bloc de piston comprenant une première partie avec une ouverture (52) dans celle-ci et une seconde partie borgne (82a), de telle sorte qu'un fluide peut circuler à travers ledit trou traversant (37) et ladite ouverture (52) lorsque ledit obturateur anti-éruption est dans un état ouvert et qu'un fluide est empêché de s'écouler à travers ledit trou traversant (37) par ladite partie borgne (82a) lorsque ledit obturateur anti-éruption est dans un état fermé.

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